Unity does in fact have a special approach to nullability, though they may have recently changed it. They (iirc, it's been a while) overloaded the == and != ope

Unity does in fact have a special approach to nullability, though they may have recently changed it. They (iirc, it's been a while) overloaded the == and != operators so that non-null instances could compare equal to null if the native object represented by the C# object had been destroyed.